The ability of continuing study and working with high responsibility to the society are indispensable to all of professional engineers. The continuing engineering educations of professional engineers, such as initial professional development (IPD) and continuing professional development (CPD) are essential for the quality assurance of the profession. We propose a trial study of the engineering ethics education for the professional engineers' IPD and CPD activities. We discuss and demonstrate the effectiveness of the study with respect to the continuing engineering educations and the social collaboration.